Heating system.



J. H. KINEALY. HEATING SYSTEM.

APPLICATION FILED MAY 16, 1904.

1,1 14,270. Patented Oct. 20, 1914.

4 SHEETS-SHEET 1.

3 INVENTOR A? ATTORNEYS THE NORRIS PETERS CO. PHOTO-LITPLI, WASHINGTON.n. z;

J. H. KINEALY.

HEATING SYSTEM.

APPLICATION FILED MAY 16, 1904.

Patented 001;. 20, 1914.

4 SHEETS-BEBE! 2.

WITNESSES:

THE NORRIS FETERS cu. PHOTO-LITHQ. WASHINGTON. D. C,

J. H. KINEALY.

HEATING SYSTEM.

rrmornon FILED MAY 16, 1904.

Patented Oct. 20, 1914.

4 SHEETS-SHEET 3.

THE NORRIS PETERS C0,.PHO10-LITH-1. WASHINGTON. D. c.

J.H.KINEALY.

HEATING SYSTEM.

APPLICATION FILED MAY 16, 1904v Patented Oct. 20, 1914.

4 SHEETS-SHEET 4.

1 3 & 1

72 l' 't' r g a lmz/ ATTORNEY$ THE NORRIS PETERS C04. PHOm-LITHQ.WASHINGTON. D C.

UNITED ornv H. KINEALY, or Bos'roiv, MASSACHUSETTS, assieivon, 13vvMESNE AssrenMEiv'rsf 'ro ANDREWG. PAULCOMPANY, A oozaronarroiv orMASSACHUSETTS.

. HEATING svs'rnivr.

Original application filed Aprillfl, 1903, Serial No. 152,008.niviaea'ana' this application filed Mayie,

1904. Serial No. 208,103.

To aZZ whom it may concern Be it known that I, JOHN H. KINEALY, acitizen of the United States, residing in Boston, in the county ofSufiiolk and State of Massachusetts, have'invented a new and use fulImprovement in *Heating Systems, of which the following is a full,clear, and eX- a'ct specification, reference being had to theaccompanying drawings, which form a part hereof.

My invention is a division of my application Serial No. 152008, filedApril 10th 1903, and it relates to heating systems inwhich steam is usedas the heating medium.

It relates to that form or type of system in which the water ofcondensationand' the air are removed through the return or dischargepipe, as distinguished from that type of system in which the air isremoved through a separate air pipe.

The object of my invention is to prevent the passage of a substantialfor material amount of steam from the heater or" the radiator into thedischarge pipe, while allowing air and water to be discharged from theheater or radiator, thus enabling the heating to be done moreeconomically, and

allowing theuse of smaller pipes for supplying the steam to the heatersor radiators, and for discharging the a r and water there:

from, and making it easier to maintain high vacuum in the dischargejplpebecause 1 of the absence of 'any n'aterial amount of" steam in saidpipe. 7

Another object of my invention is to enable steam to be usedor-maintained at different pressures in the different heaters orradiators, the steam being supplied tothe My invention also consists incombining with some or all of-the elements above men tioned, anexhauster or exhausting device connected with the escape or dischargepipe.

My invention also consists in combining with some'or all of theelementsabove mentioned a thermostat arranged toco'ntrola valve on thesupplypipei i Specification of Lettersiatent. Patented Oct 20, 1914; I

My invention also consists in certain other features of construction andcombinations of parts hereinafter described and claimed. My invention isfully shown in the accom panying drawings, in which I Figure 1 shows oneembodiment ofmy in ventionn'in which an ordinary hand valve is [used inthe supply pipe, and the discharge pipe which'is providedwith theautomatic valve device 1s connected to a receiver or trap, and aneXhauster is also connected to the receiver or trap 5 Fig. 2showsasimilar form of the invention having the additional featureof avalve .onthe supply pipe con trolled by a thermostat ';Fig. 3 shows aform of the inventlon' n which no receiver is used, but"theiexhauster isconnected directly with the end of the discharge pipe;

system having two heaters or radiators, each provided with anordinaryvalve in the sup- .ply pipe and the automatic valve device inbig. 4 shows my invention as embodied in a i improved systemto attaintheobjects above set forth; Figs. 6, 7, 8, and 9show other forms ormodifications of such a valve de-[ vice.

Similar numbers indicate similar pants the diifer'ent figures. Referringto Fig. l, 1 is a heater or radiator; *2is a supply pipe 3 is adischarge pipe;4- is'myiimproved valve device which is placed on thedischarge pipe; 5 is a' receiver or trap into which the water and the 1I air pass-which escape fronrthe'hcater or radiator-"through the ViLlVGdQVlCG; 7 1s. a, pipe connectlng the receiverwlth the atmosphere, andGis'a suitable valve .ontlie said pipe; 8 isa pipe through which thewater may be discharged or drawnotf from the receiver or trap and causedto iiow to the boiler or elsewl'iere, as n'iayIbe'c'lesired.

9'is an 'ordinaryhand valve on the supcheck valve that will openoutward, but will not open inward, and that will thus prevent thepressure in the receiver or trap from. eX-,

ceeding that of the atmosphere while allowing it to be less than theatmosphere.

The construction of one form of my improved automatic valve device 4 isclearly shown in Fig. 5. Referring to this figure, 11 is a valve casing;12 is a fluid pressure motor connected with and operating a valve piece20, .whichcontrols an outlet or discharge port 19. The upper part of thecasing is fitted with a cap 13 which is fastened to the casing bysuitable screw-threads, as shown, or many other way. This forms in theupper part of the casing, a'fluid pressure chamber 14: above the fluidpressure motor. The form of fluid pressure motor used in this valve is apiston which is fitted to the casing so as to movezup and down readilyin the casing, but not to permit any substantial amountof air or steamto escape past the piston between thepiston and the wall of the casing.The piston is provided with a projecting portion 15 extending downwardlyand carrying at its lower end thevalve piece 20. 16 is an equalizing.

passage extending, through the motor and through the downwardlyprojecting portion 15 so that the lower end of this equalizing passageis adapted to. be closed or. sealed by an accumulation of the water ofcondensation in, the casing. This equalizing passage connects the fluidpressure chamber 14, with the inlet side of the valve, and is.

made of such, a size as to permit air and steam to flow through it fromthe inlet side to the fluid pressure chamber, and also to permit somewater to flow through it afterits lower end has been sealed, as alreadyexplained. 17 is another passage through the downwardly projectingportion of the fluid pressure motor, which operates as an escape'pipe topermit the escape of air and water from the fluid pressure cham ber 14to the discharge pipe 3, 18is a plug supported by the casing. In theform shown the plug is provided with a screw-thread which takes into ascrew-thread. in the cap 13. In this way the plug is made adjustable sothat itcan be moved up or down relatively to the cap13. 21 is a smallcover or cap which is secured or otherwise suitably fastened. to the cap13, and serves to protect the plug 18 and prevent its being interferedwith after it has been once adjusted. Theupper end 'of the passage 17 isenlarged so as'to form a secondary chamber 24 in the motor. The lowerend of the plug 18 in its normal position projects downwardly into thesecondary chamber 24, and is thus 1 arranged so as to form a passage 25connecting the fluid pressure chamber with the secondary chamber 24. Thepassage 25 is smaller than the equalizing passage 16, and is of such asize as to ofier greater resistance to the flow than the equalizingpassage, It :will be seen that inthis construction the passage 17 is anescape pipe with which the passage 25 connects the fluid pressurechamber through the secondary chamber 24.

When, the piston 12 rises, the passage 25 between, the piston and theplug is increased in length, and is. thereby restricted in capacity whenthe motor is raised. It willbe seen, also, that the passage 25. is soarranged as to be connected with the lower part of the fluid. pressurechamber let when the motor is in its raised position as well as when themotor isin its lowest position. 26 is the inlet port of the valve. a

In the best form of the valve device, the fluid pressure motor is madeto work easily and with a slight difference of pressures on its upper,and lower sides; the equalizing passage 16 is fairly large so as topermit the easy flow of air and steam and of some por tion of the waterfrom the inlet side of the valve casing into the fluid pressure chamber1a the passage 25 must be large enough to permit the passage of waterfrom the fluid pressure chamber 14.- to the secondary chamber2l, buttosomewhat retard the flow of the water between these two points.

- The operation of the valve device is as follows: hen the pressure inthe heater or radiator is greater than that which exists in thedischarge pipe, any air which may be in the heater or radiator is forcedout and into 1 the valve casing through the inlet port 26; then itpasses through the equalizing passage 16 into the fluid pressure chamber14:, and from there through the passage 25 into the secondary chamber24:, and from there through the passage 17 into the discharge pipe. Whensteam enters the heater or radiator and isl; condensed, the water ofcondensation which forms therein flows out of the radiator and into thevalve casing through the inlet port 26, and gradually accumulatestherein until it fills the bottom part of the casing and seals or closesthe lower end of the equalizing passage 16. As a result of this, thepressure in the fluid pressure chamber 1%1 will become less than thepresure in the upper part of the valve casing below the fluid pressuremotor, and the pressure in the secondary chamber 24; willalso be lessthan the pressure underneath y then its influence upon the operation ofthedischarge pipe.

the-fluid pressure motor. 'Thefluidpressure motor will, therefore, rise,lifting the valve piece 20, and will thus open the outlet port 19 andallow the Water to pass from the lower portion of the valve easing intothe Some w'aterwill pass up through the equalizing passage 16 into thefluid pressure .chamber 14, and will collect on top of the fluidpressure motor. When the motor rises, the lower end of the sealed, andasa result of this, the pressure in the fluid. pressure chamber 14 willbe-' come equal to that which exists in the valve casing underneath themotor. 'At this time the water which has passed through the equalizingpassage 16 into the fluid pressure chamber 14 is flowing through thepassage 25. The size of the passage 25 is such that the escape of thiswater through the same is retarded. As a. result of. this-operation, thefall of theffluid pressure motor and the closing of the outlet port 19are retarded. When all, or a portion of the water which flowed throughthe passage 16 into the fluid pressure, chamber 14 has escapedthroughthea passage 25,, the valve closes.

In actual operation with the valve properly adjusted when the sizes ofthe fluid pressure motor 12, the equalizing passage 16, the passage25and the secondary chamber 2 1 are properly proportioned, the fluidpressure motor will not operate to open the outlet port-l9,-when onlyair'or steam when water comes to the valve device the fluid pressuremotor operates, as described,

to allow the water tolpass into the discharge pipe without allowing" anymaterial amount ofsteam to pass with it. The amount which the valvedevice 20 is lifted, and the extent to which the outlet port is therebyopened, are automatically "regulated with reference to the amount ofwater coming to the valve device. The influence of .the secondarychamber upon the operation of the fluid pressure motor depends upon itssize and upon the weight of the fluid pressure motor and the 7 partsattached to it. If the secondary chamber be made so small asto be simplyacontinuation of the passage 17 motor is apt to be small, and thebenefit of the construction may be entirelydue to the passage 25, theeffect of which is automatically controlled by the condition of thefluid passing through it. 1 By adjusting the plug 18, that is, by movingit up or, down relatively to the normal position of the motor 12, thearea or capacity of the passage 25 canbe varied: The farther down theplug is-moved,'the longertlie passage willbecome, and the greater willbe the retarding effect which it produces upon the.

' flow of waterv through the same, The plug is adjusted atsthe start tomeet the conditions of the system, and-its position need not be alteredthereafter during the operation of the device. If it becomes desirableto 'openthe valvevwide in order to clean the same, this can be doneby-111nscrewing-the 0511121 andgunscrewing the plug "suff ciently tolift itentirely out of the passage through the motor.

equalizing passage 16 will be opened or un- I Myimproved valve devicecan be used in is employed.

Inthe system represented in Fig.1, the

discharge pipe discharges into a receiver or trap 5. The exhauster 10 isconnected with the receiver, and operates to produce a vacuum in thereceiver 5' and-in the discharge pipe 3. I By employing theexhausterandproduci-ng a vacuum inthe discharge pipe,'the radiators or heaterscan be run at any pressure'desired below or "above an mosphere, anddifferent radiators can be run at difierent pressures In the systemshown in Fig.1, the air is withdrawn from the systemthroughthe receiveror trap 5 and exhauster 10, and the water is withdrawn ordischargedthrough the pipe 8 by any'suitable means, Without water comes to thevalve device, but

Referring toFig. 2, the parts are the same asalready described inconnection with Fig. 1, except that the supply valve 9 is op- 7 v '75pressure systems where atmospheric pres than atmosphere iscarried in the"system, a but the advantages 'of-my invention willbel more completelyrealized wherean exhauster erated by a thermostat '27 placed on the wallof-the room or in any other suitable;

location. Any suitable or well known arrangement of therniostat andsupply valve maybe used for. thispurpose. In the draw-J ing I haverepresented a supply valve controlled by *a diaphragm and 'apipe runningfrom this diaphragm to the thermostat 27 and continuing fromthe'thermostatto an exhauster or to asource of fluid under pres- Theexhauster or sourceof fluid unsure. der pressure is not shown in thedrawing.

close the pipe by any well. known means, operating when it closes thepipe to. at the I same time open a vent tothechamber above thediaphragm. I have'notfshown thedetails of construction in this figure asthey are well known in this art,'a'nd separately consideredformwno part.offlniy invention.

Moreover, this part of my invention is not,

chargepipe 3 is connected directly. with the exhauster 10,without;th'euse of any xre- Thethermostatcan be made to open and sch ceiver. In thisconstruction, the. water and airare removed by the exhauster and passthrough the exhausting device.

In Fig. 4 I have shown a system having two or more radiators eachradiator being provided with one of my improved automaticvalvedevices 4,as shown. The upper radiator in this figure is provided with; a

supply pipe attached to the top of theradiator, whereas the lowerradiator hasxa supply connection leading to the bottom of the radiator.In this system, no exhauste-r is used, as the system is intended to be0perated under pressure. The air and water pass into the receiver ortrap 5, from which the air escapes through the pipe 34,. and the wateris discharged through the pipe 8.

In Fig. 6 I have shown a modification of my automatic valve device. Inthis form of my improved valve, the motor 12 is made in the form of adiaphragm, which is sup? ported in any suitable manner at its edgebetween the casing 11 andv the cap 13. The diaphragm is attached in anysuitable way at the center thereof to the downwardly pro- 1 jecting part15, which carries at its lower end the valve piece 20. This valveoperates in substantially the same manner as the valveshown in F ig.-5.

In Fig. 7 I have shown another modification of my improved valve device,difiering from the valve shown in Figs. 5 and 6 in the respect thatthereis no passage 17 through the downwardly projecting part of the motor. Inplace of this passage there is an escape pipe 28 connected with the topof the plug 33, and there is a passage through the plug connecting theescape pipe with the secondary chamber 24. In this construction I preferto connect the escape pipe 28 with an eXhauster. This valve operates insubstantially the same manner as already explained, except that the. airand water which pass into the chamber 24 instead of escaping downwardlyinto the discharge pipe 3, escape through, or are drawn through theescape pipe 28.

In Fig. 8 I have shown another 1nodification of my improved valve devicediffering from the valve shown in Fig. 5 onlyin respect to theparticular construction and arrangement of the plug 18. Inthis-modification the plug 18 extends through abearing in the cap 13 andis movable up and down in that bearing by means of the thumbpiece 29.The plugis surrounded bya coiled spring 30. bearing at its upper endwhen this is done the valve will open- The plug 18 is therefore a.movable plug. In other respects the. valve device is constructed] andoperates the same as the valve device illustrated in Fig.

' In Fig- 9 I have shown another modification of my improved valvedevice. In this 1 lie-rm of my invention the cap 13 or the easisprovided with a hollow plug or projection 35 extending downwardly asshown. The motor is. provided with an upwardly extending projection 31between which and the protection 35 a second passage is formed as shown.82 is a secondary chamber which in this case is in the plug orprojection35 and this chamber is connected with an escape pipeQS passing-throughthe top of the casing. This form of valve operates in substantially thesame manner as the form of valve shown in Fig. 7.

It will be obvious that some of the details of my invention may bechanged in construction, and that the parts may be somewhat differentlyarranged from what is shown in the drawings.

Some of the advantages of my invention are as follows. The air isremoved quickly and certainly whenever it enters or collects in theradiator. The water is removed quickly and certainly whenever itaccumulates in any substantial quantity in the casing of the valve. Nosubstantial amount of steam is lost or. wasted through the dischargepipe. The valve works auto1natically, according to the requirements ofthe particularradiator to which it is attached. The valve is simple anddurable in construction, and is not likely to get out of order or toneed repairing. The valve is practically noiseless in its operation. Thevalve is economical to manufacture, and is certain in its operation. Inmy improved system, the difierent raidators canbe operated successfullyat very low presures, thereby producing great economy in the consumptionof steam. The operation of the separate raidators can also be separatelycontrolled so as to vary the pressures in the different radiatorsaccording to the requirements of the system. My

the casing forming a fluid pressure chamber on one side of saidcontrolling piece, said valve device provided with an equalizing passageconnecting said fluid pressure chamber with the inlet and a secondpassage connectingthe fluid pressure chamber with an outlet, and meansfor automatically varying the resistance to the flow of liquid in saidpassage. 7

2. The combination in a heating system ofa heater or radiator, a supplypipe, a dis charge pipeand a valve device in the discharge pipecomprising a valve casing provided with a discharge port and aninletport for the water, a valve piece controlling the discharge port, afluid pressure motor controlling the valve piece, the casing beingprovided with a fluid pressure chamber on one side of the motor,.saidvalve device provided with an equalizing passage connecting the fluidpressure chamber and the inletsideof the valve adapted to permit theflow through it of air and steam and some water,

an vescape pipe, and ansecond passage connecting the fluid pressurechamber with said escape pipe, and adapted to be restricted capacitywhen the motor-is raised. I i

3. The combination in aheatingsystem of aradiator, a supply pipe, adischarge pipe, and a valve device in the discharge pipe, said valvedevice including a valve casing provided with a discharge port and aninlet port, a movable valve member controlling said discharge port, avalve controlling pieceoperated by fluid pressure; the casing forming afluid pressure chamber on one side of said controlling piece, said valvedevice provided with an equalizing passage connecting said fluidpressure chamber with the inlet and a second passage connecting thefluid pressure chamber with an outlet, and discharge means forautomatically varying the resistance to the flow of liquid in saidpassage consisting of a scr'ew' threaded plug.

4. The combination in a heating system of a radiator, a supply'pipe, adischarge pipe, and a valve device inthe discharge pipe,vsaid valvedevice comprising a valve casing provided with a discharge port and aninlet port, a valve piece controlling the discharge port, a fluidpressure motor controlling the valve piece, the casing forming a fluidpressure chamber on one side of the motor, said valve device providedwith an equalizing passage through the motor connecting the fluidpressure chamber and the inlet side of the valve and a secondpassagehconnecting the fluid pressure chamber with an escape pipe, meansfor automatically varying .the resistance to the flow of liquid throughsaid second passage, and an escape pipe, substantially as set forth. 1 I

.5. The combination in a heating system of a heater or radiator, asupply pipe, a dischargepipe and a valve devicein the discharge pipe,comprising a valve casing protrolling: the valve piece, the casing beingprovided with a fluid pressure chamberjon one side of the motor, saidvalve device provided With an equalizing passagethrough the motorconnecting the fluid pressure chamber and the inlet side of thevalve andadapted to besealed by anaccumulation'of liquid in the casing and asecond passage through the motor connecting the fluid pressurechamberwiththe discharge pipe, the second passage being smaller than the'equalizing passage and of such a size as to permit theescape of air butto retard'the escape of water, and being adapted tobe restricted in i icapacity when'the motor is raised, r substantially. as set forth. j

6. The combination in a heating system of a heater or radiator, a supplypipe, a discharge pipe, and a'valvc device comprising a valve casingprovided with a'i discharge port and an inlet port/for the-water, avalvepiece controlling the discharge port, aJfluid pressure motor controllingthe valve piece, the casing being provided with a fluid pres surechamber on one side of the motor, said valve device provided with anequalizing passage connecting the'fluid pressure chainber andthe inletside of the valve adapted topermit the flow through it of air and steam.and some water, aplug supported by c the casing, and a second passagebetweenthe' plug and the motor connecting the fluid pressure chamberwith an escape pipe,'and an escape pipe, substantially asset forth. 7.The combination in a heating system of a heater or'radiator, asupply'pipe, a discharge pipeand a valve device in the discharge pipecomprisinga valve casing provided with a discharge port and an inletport for the water, a valve piece controlling the;

discharge port, a fluid pressure motor con? trolling the valve piece,the casing belng one side of the motor), said valve device provided.withan equalizingpassage connecting I v the fluid pressure chamber andthe inlet side of the valve adapted to permit the flow. through it ofair steam and some water and a second passage'in the motor CORHGCU- mgthe fluid pressure chamber, with an escape pipe, a plug supported by thecasing and projecting into the second passage,'and anescape pipe,substantially as set forth. I

8. The combination in, aheating system'ofaheater or radiator, a supplypipe," a .dis-

charge pipe and a valve device in the dis-:

charge pipe comprising avalvecasing pro-- vided -with a discharge portand an inlet. port for the water, a valve piece controlling thedischarge port, a fluid pressure vmotor provided with a fluidpressureichamber on controlling the valve piece, thecasing being r 1 10providedwith a' fluid pressurepchaniber on one side of the motor, saidvalve device provided with an equalizing passage connecting the fluidpressure chamber and the inlet side of the valve adapted to permit theflow through it of air and steam and some water and a second passage inthe motor connecting the fluid pressure chamber with an escape pipe, anadjustable plug supported by the casing and projecting into the secondpassage, and an escape pipe, substantially as set forth.

9. The combination in a heating system of a heater or radiator, a supplypipe, a discharge pipe and a valve device in the discharge pipecomprising a valve casing provided with a discharge port and an inletportfor the water, a valve piece controlling the discharge port, a.fluid pressure motor controlling the valve piece, the casing beingprovided with a fluid pressure chamber on one side of the motor, saidvalve device provided with an equalizing passage connecting the fluidpressure chamber and the inlet side of the valve adapted to permit theflow'through it of air and steaman'd some water and a secondary chamberin the motor, a plug supported by the casing andprojecting into thesecondary chamber and so arranged as to form a passage between the fluidpressure chamber and the secondary chamber smaller than the equalizingpassage, and an escape pipe connected with the secondary chamber,substantially as set forth.

10. The combination in a heating system of a heater or radiator, asupply pipe, a discharge pipe and a valve device in the discharge pipecomprising a valve casing provided with a discharge port and an inlet.port for the water, a valve piece controlling the discharge port, afluid pressure motor controlling the valve piece, the casing beingprovided with a fluid pressure chamber on one side of the motor, saidvalve device provided with an equalizing passage connecting the fluidpressure chamber and the inlet side of the valve adapted to permit the.flow throughitof air and steam and some water and a secondary chamber inthe motor, an adjustable plug supported by the casing and projectingintothe secondary chamber and soarranged'a's to form a passage betweenthe fluid pressure chamber and the secondary chamber smaller than theequalizing passage, and an escape pipe I connected with thesecondarychambe'r, sub- 'stantially as set forth.

. 11. The combination in a heating system of a heater or radiator, asupply pipe, a discharge pipe and a valve device in the dischargepipecomprising a valve casing provided with a discharge port and an inletportfor the water, a valve'piece controlling the discharge port, a fluidpressure motor controlling the valve piece,- the casing being [providedwith a fluid pressure chamber on one side of the motor, said valvedevice pro vided with an equalizing passage connecting the fluidpressure chamber and the inlet side of the valve adapted to permit theflow through it of air and steam and some water and a secondary chamberin the motor, a plug supported by the casing and projecting into thesecondary chamber and so arranged as to form a passage between the fluidpressure chamber and the secondary chamber smaller than the equalizingpassage, and .a passage through the motor connecting the secondarychamber with the discharge pipe, substantially as set forth.

12. The combination in a heating system of a heater or radiator, asupply pipe, a discharge pipe, and a valve device in the discharge pipe,said valve device including a valve casing provided with a dischargeport and an inlet port, a valve piece controlling said discharge port, afluid pressure motor controlling said valve piece, the casing forming afluid pressure'chamber on one side of said motor, said valve deviceprovided with an equalizing passage through said motor connecting saidfluid pressure chamber with the inlet and a second passage through themotor connecting the fluid pressure chamber with the discharge pipe andmeans whereby the resistance of said second passage is automaticallyvaried to ofler greater resistance to the flow Within the first namedpassage, substantially as set forth.

13. The combination in a heating system of a heater or radiator, asupply pipe, a valve in thesupply pipe, a discharge pipe and a valvedevice in the discharge pipe comprising a valve casing provided with adischarge port and an inlet port for the water, a valve piececontrolling the discharge port, a fluid pressure motor controlling thevalve piece, the casing being provided with a fluid pressure chamber onone side of the motor, said valve device provided with an equalizingpassage connecting the fluid pressure chamber and the inlet side of thevalve adapted to permit the flow through it of air and steam and somewater and a second passage in the motor connecting the fluid pressurechamber with an escape pipe, a; plug supported by the casing andprojecting into the second passage, a thermostat controlling the valvein the supplypipe, and an escape pipe, substantially as set forth.

14. The combination in a heating system of'a heater or radiator, asupply pipe, a valve in the supply pipe, a discharge pipe and a' valvedevice in the discharge pipe comprising a valve casing provided with adischarge port and an inlet port for the water, a valve piececontrolling the discharge port, a fluid pressure motor controlling thevalve piece, the casing being provided with a fluid pressure chamber onone side of the it of air and steam and-somewater and a secondarychamber in the motor, a plug supported by the casing and pro ecting mtothe secondary chamber andso arranged as to form a passage between thefluidpres' sure chamber and the secondary chamber smaller than theequalizing passage, an escape pipe connected with the secondary chamber,and a thermostat controlling the valve in the supply pipe, substantiallyas set forth. V

15. The combination in a heating system of a heater or radiator, asupply pipe, a valve in the supply pipe, a discharge pipe and a valvedevice in the discharge pipe comprising a valve casing provided with adischarge port and an inlet port for the water,.a valve piececontrolling the discharge port, a fluid pressure motor controlling thevalve piece,

, the casing being provided with a fluid pressure chamber on one side ofthe motor, said valve device provided with an equalizing passageconnecting the fluid pressure chamher and the inlet side of the valveadapted to permit the flow through it of air and steam and some water, asecondary chamber in the motor, a plug supported by the casing andprojecting into the secondary chamber and so arranged as to form apassage between the fluid pressure chamber and the secondary chambersmaller than the equalizing passage, and a passage through the motorconnecting the secondary chamber with the discharge pipe, and athermostat controlling the valve in thesupply pipe, substantially assetforth.

16. The combination in a heating system of a heater or radiator, asupply pipe, a valve in the supply pipe, a discharge pipe and a valvedevice in the discharge pipe comprising a valve casing provided with adischarge port and an inlet port for the water, a valve piececontrolling the discharge port, a fluid pressure motor controlling thevalve piece, thecasing being provided with a fluid pres sure chamber onone side of the motor, said valve device provided with an equalizingpassage connecting the fluid pressure chamber'and the inlet side of thevalve-adapted to permit the flow through it of air and steam and somewater and asecond passage in the motor connecting the fluid pressurechamber with an escape pipe, a plug supported'by the casing andprojecting into the second passage, an escape pipe, a thermostatcontrolling the valve in the supply pipe, and an exhausting deviceconnected with the escape pipe, substantially as set forth.

17. The combination in a heating system of a heater or radiator, asupply pipe, a

valve in the supply pipe, a discharge pipe and a valve devlce in thedischarge pipe compris ng avalve casing provided with a I discharge portand an inlet port for i the water,a valve piece .controllingthedischarge port, a fluid pressure motor controlling the valve piece thecasing being provided with" a fluid pressure chamber on one side of themotor,jsaidvalve device provided Witlran equalizing passage connectingthe fluidpressure chamber and the inlet side of the valve adapted topermitthe flow through it of. air and steam and some water and asecondary chamber in themotor, a plug supported by the casing andprojecting into the secondary chamber and so arranged as to form apassage between the fluid pressure chamber and the secondary chambersmaller than. the equalizing. passage, an escape pipe connected with thesecondary chamber, a thermostat controlling the valve in the supplypipe,and an exhausting device connected with the I escape pipe,substantially as set forth. c

18' The combination ina heating system i of a heater or radiator, asupply plpe, a (11s- ,charge pipe and a valve device in the dischargepipe comprising a valve casing pro vided with a discharge port and aninlet port for the water, a valve piece controlling the discharge port,a fluid pressure motor controlling the valve piece the casing beingprovided with a fluid pressure chamber on one side of the motor, saidvalve device provided with an equalizing passage connecting the fluidpressure chamber and the inlet side i of the valve adapted to permit theflow through it of air and steam and some water, a secondary chamber inthe motor, a plug supported by the casing and projecting into thesecondary chamber and so arranged as to form a passage, between thefluid pressure chamber and the secondary chamber smaller than theequalizing passage, and a passage through the motor bonnecting thesecondary,

chamber with the discharge pipe, and a trap into which the dischargepipe empties, sub-- stantially as set forth. j i

19. The combination in a heating system of a heater or radiator, asupply pipe, a discharge pipe and avalve deviceinthe dis charge pipecomprising a valve casing provided with a discharge port and an inletport for the water, a valve piece controlling the discharge port, afluid pressure motor; controlling the valve piece, the *casingbeingprovided with a fluid pressure chamber on one side of the motor, anequalizing passage connecting the fluid pressure chamber and the inletside of the valvea-dapt'ed .to permit the flow through it of air andsteam and some water, a secondary chamber in the I motor, a plugsupported by the casir'ig and projecting into, the secondary chamber andso arranged as to form a passage between thefluid pressure chamber andthe secondary chzimber smaller than the equalizing passage, name to thisspecification, in the presence of alnd a passage thfi'ough the motorconnecting two subscribing Witnesses. tiesecondar c amber with thedischarge pipe, a trap into which the. discharge pipe JOHN KINEALY" 5e111pties','and an exhausting device connected Witnesses;-

with the trap, substantially as set forth. ,E. G. BIRTWEIL,

In testimony whereof I have vsigned my GEORGE D. WILDES.

Copies of this patent may be obtained m -five cents each, by atld resing the Coiiimissioner of iaitents; Washington, D. G?

